viewer.js

// viewer.js
// ==============================

let pc;
export let app = null;
let cameraEntity = null;
let modelEntity = null;
let viewerInitialized = false;
let resizeObserver = null;

let chosenCameraX, chosenCameraY, chosenCameraZ;
let minZoom, maxZoom, minAngle, maxAngle, minAzimuth, maxAzimuth, minPivotY, minY;
let modelX, modelY, modelZ, modelScale, modelRotationX, modelRotationY, modelRotationZ;
let plyUrl, glbUrl;

export async function initializeViewer(config, instanceId) {
  if (viewerInitialized) return;

  const isIOS = /iPad|iPhone|iPod/.test(navigator.userAgent) && !window.MSStream;
  const isMobile = isIOS || /Android/i.test(navigator.userAgent);

  plyUrl = config.ply_url;
  glbUrl = config.glb_url;
  minZoom = parseFloat(config.minZoom || "1");
  maxZoom = parseFloat(config.maxZoom || "20");
  minAngle = parseFloat(config.minAngle || "-45");
  maxAngle = parseFloat(config.maxAngle || "90");
  minAzimuth = (config.minAzimuth !== undefined) ? parseFloat(config.minAzimuth) : -360;
  maxAzimuth = (config.maxAzimuth !== undefined) ? parseFloat(config.maxAzimuth) : 360;
  minPivotY = parseFloat(config.minPivotY || "0");
  minY = (config.minY !== undefined) ? parseFloat(config.minY) : 0;

  modelX = (config.modelX !== undefined) ? parseFloat(config.modelX) : 0;
  modelY = (config.modelY !== undefined) ? parseFloat(config.modelY) : 0;
  modelZ = (config.modelZ !== undefined) ? parseFloat(config.modelZ) : 0;
  modelScale = (config.modelScale !== undefined) ? parseFloat(config.modelScale) : 1;
  modelRotationX = (config.modelRotationX !== undefined) ? parseFloat(config.modelRotationX) : 0;
  modelRotationY = (config.modelRotationY !== undefined) ? parseFloat(config.modelRotationY) : 0;
  modelRotationZ = (config.modelRotationZ !== undefined) ? parseFloat(config.modelRotationZ) : 0;

  const cameraX = parseFloat(config.cameraX || "0");
  const cameraY = parseFloat(config.cameraY || "2");
  const cameraZ = parseFloat(config.cameraZ || "5");
  const cameraXPhone = parseFloat(config.cameraXPhone || cameraX);
  const cameraYPhone = parseFloat(config.cameraYPhone || cameraY);
  const cameraZPhone = parseFloat(config.cameraZPhone || cameraZ * 1.5);

  chosenCameraX = isMobile ? cameraXPhone : cameraX;
  chosenCameraY = isMobile ? cameraYPhone : cameraY;
  chosenCameraZ = isMobile ? cameraZPhone : cameraZ;

  const canvasId = 'canvas-' + instanceId;
  const progressDialog = document.getElementById('progress-dialog-' + instanceId);
  const viewerContainer = document.getElementById('viewer-container-' + instanceId);

  let oldCanvas = document.getElementById(canvasId);
  if (oldCanvas) oldCanvas.remove();

  const canvas = document.createElement('canvas');
  canvas.id = canvasId;
  canvas.className = 'ply-canvas';
  canvas.style.width = "100%";
  canvas.style.height = "100%";
  viewerContainer.insertBefore(canvas, progressDialog);

  canvas.style.touchAction = "none";
  canvas.style.webkitTouchCallout = "none";

  progressDialog.style.display = 'block';

  if (!pc) {
    pc = await import("https://esm.run/playcanvas");
    window.pc = pc;
  }

  // Explicitly ensure arraybuffer for PLY on iOS Safari
  const plyAsset = new pc.Asset('gsplat', 'gsplat', {
    url: plyUrl,
    responseType: 'arraybuffer'  // Crucial explicit fix
  });

  const assets = {
    model: plyAsset,
    galerie: new pc.Asset('galerie', 'container', { url: glbUrl }),
    hdr: new pc.Asset('hdr', 'texture', {
      url: "https://huggingface.co/datasets/bilca/ply_files/resolve/main/galeries/blanc.png"
    }, { type: pc.TEXTURETYPE_RGBP, mipmaps: false })
  };

  const device = await pc.createGraphicsDevice(canvas, {
    deviceTypes: ["webgl2"],
    antialias: false
  });
  device.maxPixelRatio = Math.min(window.devicePixelRatio, 2);

  const opts = new pc.AppOptions();
  opts.graphicsDevice = device;
  opts.mouse = new pc.Mouse(document.body);
  opts.touch = new pc.TouchDevice(document.body);

  app = new pc.Application(canvas, opts);
  app.setCanvasFillMode(pc.FILLMODE_NONE);
  app.setCanvasResolution(pc.RESOLUTION_AUTO);

  resizeObserver = new ResizeObserver(entries => {
    for (const entry of entries) {
      app.resizeCanvas(entry.contentRect.width, entry.contentRect.height);
    }
  });
  resizeObserver.observe(viewerContainer);

  app.assets.add(assets.model);
  app.assets.add(assets.galerie);
  app.assets.add(assets.hdr);

  assets.model.ready(() => {
    modelEntity = new pc.Entity('model');
    modelEntity.addComponent('gsplat', { asset: assets.model });
    modelEntity.setLocalPosition(modelX, modelY, modelZ);
    modelEntity.setLocalEulerAngles(modelRotationX, modelRotationY, modelRotationZ);
    modelEntity.setLocalScale(modelScale, modelScale, modelScale);
    app.root.addChild(modelEntity);
    progressDialog.style.display = 'none';
  });

  app.start();

  cameraEntity = new pc.Entity('camera');
  cameraEntity.addComponent('camera', { clearColor: new pc.Color(0.2, 0.2, 0.2, 1) });
  cameraEntity.setPosition(chosenCameraX, chosenCameraY, chosenCameraZ);
  cameraEntity.lookAt(pc.Vec3.ZERO);

  cameraEntity.addComponent('script');
  cameraEntity.script.create('orbitCamera', {
    attributes: {
      inertiaFactor: 0.2,
      focusEntity: modelEntity,
      distanceMax: maxZoom,
      distanceMin: minZoom,
      pitchAngleMax: maxAngle,
      pitchAngleMin: minAngle,
      yawAngleMax: maxAzimuth,
      yawAngleMin: minAzimuth,
      minPivotY: minPivotY,
      minY: minY,
      frameOnStart: true
    }
  });

  cameraEntity.script.create('orbitCameraInputMouse');
  cameraEntity.script.create('orbitCameraInputTouch');

  app.root.addChild(cameraEntity);

  viewerInitialized = true;
}

export function resetViewerCamera() {
  if (cameraEntity && cameraEntity.script.orbitCamera) {
    cameraEntity.script.orbitCamera.reset();
  }
}

export function cleanupViewer() {
  if (app) app.destroy();
  app = null;
  viewerInitialized = false;
  if (resizeObserver) resizeObserver.disconnect();
}